1. The problem statement, all variables and given/known data The motion of a particle is given by: x = (6.0m) cos(0.586t + 0.72) a) Find the amplitude b) Find the Period c) Find the first time for t>0 when v=0 d) Find the maximum acceleration e) Fine the phase at time t=1.38s 2. Relevant equations x = A cos ωt T = 2pi/ω f = 1/T 3. The attempt at a solution I am taking the course on Online, there is no online lecture.. Have to learn everything from the textbook but, English is my second language :'( Having hard time understand the basic concept.. a) A = 6.0 b) I don't know about 0.586t + 0.72 should I just calculate like.. T = 2pi / ω , T =2pi/0.586 ? Where do I use 0.72? c) v=0 (t>0) it means, fine the time at T/2 ? d) no idea.. e) is phase means to find x ? so just plug t=1.38 in the formular? Thank you so much for your help.. quicker the better.. I am not even done with studying everything , but have a final exam in 2 days. .. I started the course 5 weeks ago with another offline course.. (due to school's cancellation of my course) , and so far finished 12 chapters.., 2 more chapters to go!! Any help would be so appreciated!! Thanks!!